/*
 ============================================================================
 Page	     : 285-286
 Name        : rain.c
 Date	     : 20210405
 Author      : Hbue 18060333
 Copyright   : Your copyright notice
 Description : 计算每年的总降水量、年平均降水量和5年中每月的平均降水量
 ============================================================================
 */

#include <stdio.h>
#define MONTHS 12		// 一年的月份数
#define YEARS 5			// 年数

int main(void)
{
	// 用2010~2014年的降水量数据初始化数据
	const float rain[YEARS][MONTHS] =
	{
			{4.3, 4.3, 4.3, 3.0, 2.0, 1.2, 0.2, 0.2, 0.4, 2.4, 3.5, 6.6},
			{8.5, 8.2, 1.2, 1.6, 2.4, 0.0, 5.2, 0.9, 0.3, 0.9, 1.4, 7.3},
			{9.1, 8.5, 6.7, 4.3, 2.1, 0.8, 0.2, 0.2, 1.1, 2.3, 6.1, 8.4},
			{7.2, 9.9, 8.4, 3.3, 1.2, 0.8, 0.4, 0.0, 0.6, 1.7, 4.3, 6.2},
			{7.6, 5.6, 3.8, 2.8, 3.8, 0.2, 0.0, 0.0, 0.0, 1.3, 2.6, 5.2}
	};
	int year = 0;
	int month = 0;
	float subtot = 0;
	float total = 0;

	printf(" YEAR    RAINFALL  (inches)\n");
	for(year = 0, total = 0;year < YEARS;year++)
	{						// 每一年,各月的降水量总和
		for(month = 0, subtot = 0; month < MONTHS; month++)
		{
			subtot += rain[year][month];
		}
		printf("%5d %15.1f\n", 2010 + year, subtot);
		total += subtot;	// 5年的总降水量
	}
	printf("\nThe yearly average is %.1f inches.\n\n", total / YEARS);
	printf("MONTHLY AVERAGES:\n\n");
	printf(" Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec\n");

	for(month = 0; month < MONTHS; month++)
	{							// 每个月,5年的总降水量
		for(year = 0,subtot = 0; year < YEARS; year++)
		{
			subtot += rain[year][month];
		}
		printf("%4.1f ", subtot/ YEARS);
	}
	printf("\n");

	return 0;
}

